code: def test_trace_single_op(data1: ActionObject) -> None:
      """Test that we can recreate the correct history hash using TraceMode"""
      result1 = data1.std()
      trace_result = NumpyArrayObject.from_obj(
          ActionDataEmpty(), id=data1.id
      ).std()
  
      assert result1.syft_history_hash == trace_result.syft_history_hash
  
file_path: PySyft/packages/syft/tests/syft/code_verification_test.py
imports: import numpy
  import pytest
  from syft.service.action.action_data_empty import ActionDataEmpty
  from syft.service.action.action_object import ActionObject
  from syft.service.action.numpy import NumpyArrayObject
label_desc: Use image node_id 9 for calling a global function with example usage: test_trace_single_op(data1) without return types